Merge pull request #53 from bnfinet/v5

receive docker hub notification of automated build

Author: Dean Karn

docker/docker.go

@@ -0,0 +1,93 @@
+package docker
+
+// this package recieves the Docker Hub Automated Build webhook
+// https://docs.docker.com/docker-hub/webhooks/
+// NOT the Docker Trusted Registry webhook
+// https://docs.docker.com/ee/dtr/user/create-and-manage-webhooks/
+
+import (
+	"encoding/json"
+	"errors"
+	"io"
+	"io/ioutil"
+	"net/http"
+)
+
+// parse errors
+var (
+	ErrInvalidHTTPMethod = errors.New("invalid HTTP Method")
+	ErrParsingPayload    = errors.New("error parsing payload")
+)
+
+// Event defines a Docker hook event type
+type Event string
+
+// Docker hook types (only one for now)
+const (
+	BuildEvent Event = "build"
+)
+
+// BuildPayload a docker hub build notice
+// https://docs.docker.com/docker-hub/webhooks/
+type BuildPayload struct {
+	CallbackURL string `json:"callback_url"`
+	PushData    struct {
+		Images   []string `json:"images"`
+		PushedAt float32  `json:"pushed_at"`
+		Pusher   string   `json:"pusher"`
+		Tag      string   `json:"tag"`
+	} `json:"push_data"`
+	Repository struct {
+		CommentCount    int     `json:"comment_count"`
+		DateCreated     float32 `json:"date_created"`
+		Description     string  `json:"description"`
+		Dockerfile      string  `json:"dockerfile"`
+		FullDescription string  `json:"full_description"`
+		IsOfficial      bool    `json:"is_official"`
+		IsPrivate       bool    `json:"is_private"`
+		IsTrusted       bool    `json:"is_trusted"`
+		Name            string  `json:"name"`
+		Namespace       string  `json:"namespace"`
+		Owner           string  `json:"owner"`
+		RepoName        string  `json:"repo_name"`
+		RepoURL         string  `json:"repo_url"`
+		StarCount       int     `json:"star_count"`
+		Status          string  `json:"status"`
+	} `json:"repository"`
+}
+
+// Webhook instance contains all methods needed to process events
+type Webhook struct {
+	secret string
+}
+
+// New creates and returns a WebHook instance
+func New() (*Webhook, error) {
+	hook := new(Webhook)
+	return hook, nil
+}
+
+// Parse verifies and parses the events specified and returns the payload object or an error
+func (hook Webhook) Parse(r *http.Request, events ...Event) (interface{}, error) {
+	defer func() {
+		_, _ = io.Copy(ioutil.Discard, r.Body)
+		_ = r.Body.Close()
+	}()
+
+	if r.Method != http.MethodPost {
+		return nil, ErrInvalidHTTPMethod
+	}
+
+	payload, err := ioutil.ReadAll(r.Body)
+	if err != nil || len(payload) == 0 {
+		return nil, ErrParsingPayload
+	}
+
+	var pl BuildPayload
+	err = json.Unmarshal([]byte(payload), &pl)
+	if err != nil {
+		return nil, ErrParsingPayload
+	}
+	return pl, err
+
+}

docker/docker_test.go

@@ -0,0 +1,95 @@
+package docker
+
+import (
+	"log"
+	"net/http"
+	"net/http/httptest"
+	"os"
+	"testing"
+
+	"reflect"
+
+	"github.com/stretchr/testify/require"
+)
+
+// NOTES:
+// - Run "go test" to run tests
+// - Run "gocov test | gocov report" to report on test converage by file
+// - Run "gocov test | gocov annotate -" to report on all code and functions, those ,marked with "MISS" were never called
+//
+// or
+//
+// -- may be a good idea to change to output path to somewherelike /tmp
+// go test -coverprofile cover.out && go tool cover -html=cover.out -o cover.html
+//
+
+const (
+	path = "/webhooks"
+)
+
+var hook *Webhook
+
+func TestMain(m *testing.M) {
+
+	// setup
+	var err error
+	hook, err = New()
+	if err != nil {
+		log.Fatal(err)
+	}
+	os.Exit(m.Run())
+	// teardown
+}
+
+func newServer(handler http.HandlerFunc) *httptest.Server {
+	mux := http.NewServeMux()
+	mux.HandleFunc(path, handler)
+	return httptest.NewServer(mux)
+}
+
+func TestWebhooks(t *testing.T) {
+	assert := require.New(t)
+	tests := []struct {
+		name     string
+		event    Event
+		typ      interface{}
+		filename string
+		headers  http.Header
+	}{
+		{
+			name:     "BuildEvent",
+			event:    BuildEvent,
+			typ:      BuildPayload{},
+			filename: "../testdata/docker/docker_hub_build_notice.json",
+		},
+	}
+
+	for _, tt := range tests {
+		tc := tt
+		client := &http.Client{}
+		t.Run(tt.name, func(t *testing.T) {
+			t.Parallel()
+			payload, err := os.Open(tc.filename)
+			assert.NoError(err)
+			defer func() {
+				_ = payload.Close()
+			}()
+
+			var parseError error
+			var results interface{}
+			server := newServer(func(w http.ResponseWriter, r *http.Request) {
+				results, parseError = hook.Parse(r, tc.event)
+			})
+			defer server.Close()
+			req, err := http.NewRequest(http.MethodPost, server.URL+path, payload)
+			assert.NoError(err)
+			req.Header.Set("Content-Type", "application/json")
+
+			resp, err := client.Do(req)
+			assert.NoError(err)
+			assert.Equal(http.StatusOK, resp.StatusCode)
+			assert.NoError(parseError)
+			assert.Equal(reflect.TypeOf(tc.typ), reflect.TypeOf(results))
+		})
+	}
+}

testdata/docker/docker_hub_build_notice.json

@@ -0,0 +1,30 @@
+{
+  "callback_url": "https://registry.hub.docker.com/u/svendowideit/testhook/hook/2141b5bi5i5b02bec211i4eeih0242eg11000a/",
+  "push_data": {
+    "images": [
+        "27d47432a69bca5f2700e4dff7de0388ed65f9d3fb1ec645e2bc24c223dc1cc3",
+        "51a9c7c1f8bb2fa19bcd09789a34e63f35abb80044bc10196e304f6634cc582c",
+        "..."
+    ],
+    "pushed_at": 1.417566161e+09,
+    "pusher": "trustedbuilder",
+    "tag": "latest"
+  },
+  "repository": {
+    "comment_count": 0,
+    "date_created": 1.417494799e+09,
+    "description": "",
+    "dockerfile": "#\n# BUILD\u0009\u0009docker build -t svendowideit/apt-cacher .\n# RUN\u0009\u0009docker run -d -p 3142:3142 -name apt-cacher-run apt-cacher\n#\n# and then you can run containers with:\n# \u0009\u0009docker run -t -i -rm -e http_proxy http://192.168.1.2:3142/ debian bash\n#\nFROM\u0009\u0009ubuntu\n\n\nVOLUME\u0009\u0009[/var/cache/apt-cacher-ng]\nRUN\u0009\u0009apt-get update ; apt-get install -yq apt-cacher-ng\n\nEXPOSE \u0009\u00093142\nCMD\u0009\u0009chmod 777 /var/cache/apt-cacher-ng ; /etc/init.d/apt-cacher-ng start ; tail -f /var/log/apt-cacher-ng/*\n",
+    "full_description": "Docker Hub based automated build from a GitHub repo",
+    "is_official": false,
+    "is_private": true,
+    "is_trusted": true,
+    "name": "testhook",
+    "namespace": "svendowideit",
+    "owner": "svendowideit",
+    "repo_name": "svendowideit/testhook",
+    "repo_url": "https://registry.hub.docker.com/u/svendowideit/testhook/",
+    "star_count": 0,
+    "status": "Active"
+  }
+}